5. Name the source of smack. Mention one way in which affects the human body.

Ans: Obtained from Papaver somniferum(Poppy plant)

It acts as depressant

6. In plants, how is alien DNA introduced into the host cell?

Ans: To introduce alien DNA in plants, plant cells are bombarded with high velocity micro particles of gold or tungungsten coated with DNA in a method known as biolistics or gene gun (gene transfer methods).

7. Mr. Galgotia eats curd/ yogurt. IN this case, which trophic level will be occupy?

Ans: Third trophic level

8. In the absence of the predators, which curve (a) or (b) would appropriately depict the prey populations?